Mobile World Congress 2017

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Mobile World Congress, the annual technology and telecom trade show, takes place once again this week in the heart of Barcelona. Thanks to the meteoric growth in importance mobile devices and services have had within the global economy, MWC's place on the tech calendar is second only to Las Vegas's Consumer Electronics Show in January. And to some, Barcelona's show is the most important of the year. Photographs by Chris Ratcliffe and Pau Barrena/Bloomberg, (글: Nate Lanxon natelanxon, Tom Hall)

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Huawei updated its flagship line, introducing the P10 phone with Leica camera technology and curved edges at its own event on Sunday. The company has vowed to displace Apple and Samsung from the top of the global smartphone rankings in five years, aiming for market share of 25 percent globally

Huawei CEO Richard Yu launches the company's Watch 2 smartwatch. The device is one of the first to run Google's latest Android Wear 2 operating system, which places it as a chief competitor to the Apple Watch.

Attendees take photographs ahead of the Samsung news conference. ​The company teased its coming Galaxy S8 smartphone and released new tablets targeting video-gamers and professionals as the company seeks to regain ground lost after pulling its Note 7 from shelves last year.

Samsung executive Mark Notton, left, holds a Galaxy Tab S3 tablet during the company's news conference. The tablet is meant for entertainment and has a 9.7-inch Amoled screen, quad-stereo speakers and lets users play 4K video.

An attendee uses a new Samsung S Pen on one of the company's Galaxy S3 tablets. The aesthetics are based on the classic Staedtler Noris pencil used in classrooms around the world, except now it can be used to write and sketch on digital devices.

Attendees during the BlackBerry launch event held to showcase the new KeyOne -- a smartphone with a traditional BlackBerry keyboard and functionality, only now built in partnership with manufacturer TCL. One for the BlackBerry faithful alone.

A pedestrian takes a selfie outside the conference center.

The Blackberry KeyOne. Like many BlackBerrys, the selling point is the traditional keyboard. It also includes a 12-megapixel camera and a Qualcomm processor. It runs on Google's Android OS rather than the older BlackBerry OS. 

Attendees rest up ahead of a news conference.

An attendee uses a smartphone to film the new Samsung Galaxy S3 tablet.